scholarly journals Precise Compact System For Ionizing Radiation Detection And Signal Processing With Advanced Components Integration And Electronic Control

2015 ◽  
Vol 66 (4) ◽  
pp. 220-225 ◽  
Author(s):  
Jakub Navařík ◽  
Petr Novák ◽  
Jiří Pechoušek ◽  
Libor Machala ◽  
Dalibor Jančík ◽  
...  
Keyword(s):  
Nuclear Physics ◽  
Mössbauer Effect ◽  
Detection System ◽  
Radiation Detection ◽  
Mossbauer Effect ◽  
Natural Iron ◽  
Different Types ◽  
And Performance ◽  
Physics Experiments

Abstract Quality and performance of a detection system are the crucial parameters in all nuclear physics experiments. This system serves as a source of all signals and noises to be processed. Better performance, higher amplification and lower noises occurrence simplify subsequent signal analysis. In the field of Mössbauer spectroscopy, the spectrum quality and Mössbauer effect are crucial parameters which are affected especially by the quality of the detection system. These parameters were evaluated for different types of a detection setup. Finally an improvement of the spectrum quality by 15% and Mössbauer effect by 7% has been achieved for the natural iron reference absorber measurement in comparison with previous version of the detection system.

Design, construction, and performance of a high-resolution π0 spectrometer for nuclear physics experiments

1981 ◽  
Vol 180 (2-3) ◽  
pp. 445-459 ◽  
Author(s):  
H.W. Baer ◽  
R.D. Bolton ◽  
J.D. Bowman ◽  
M.D. Cooper ◽  
F.H. Cverna ◽  
...  
Keyword(s):  
High Resolution ◽  
Nuclear Physics ◽  
And Performance ◽  
Physics Experiments ◽  
Design Construction

scholarly journals Application of Rubrics in the Classroom: A Vital Tool for Improvement in Assessment, Feedback and Learning

2018 ◽  
Vol 12 (1) ◽  
pp. 61 ◽  
Author(s):  
Faieza Chowdhury
Keyword(s):  
Student Performance ◽  
Early Stage ◽  
Effective Feedback ◽  
Assessment Feedback ◽  
Different Types ◽  
Unbiased Manner ◽  
And Performance ◽  
Teaching Learning ◽  
Improve Student Learning

Teaching is filled with spirited debate about the best practices for improving students' learning and performance. Today, educators from different parts of the world are supporting the use of rubrics as an instructional tool and highlighting the enormous contributions that rubrics can make in the teaching-learning paradigm. A rubric is a useful grading tool which can help instructors to grade students' work in a more consistent, reliable and unbiased manner. A well-designed rubric can help students to identify their strengths and weaknesses and be more objective about their own quality of work. Although some studies have examined the benefits of rubrics on student performance levels; nevertheless, research on rubrics is still at an early stage. In this paper we will explore what a rubric is, the different types of rubrics that can be utilized in the classroom and the process of constructing a rubric. We will also discuss how the application of rubrics in teaching can help educators to improve student learning and provide more effective feedback on student performance.

scholarly journals The Q-Pass Index: A Multifactorial IMUs-Based Tool to Assess Passing Skills in Basketball

Sensors ◽  
2021 ◽  
Vol 21 (13) ◽  
pp. 4601
Author(s):  
Arturo Quílez-Maimón ◽  
Francisco Javier Rojas-Ruiz ◽  
Gabriel Delgado-García ◽  
Javier Courel-Ibáñez
Keyword(s):  
Inertial Sensors ◽  
Basketball Players ◽  
Video Cameras ◽  
Different Types ◽  
Practical Tool ◽  
And Performance ◽  
Pattern Variability ◽  
Different Levels ◽  
Practical Measure

Despite being a key sport-specific characteristic in performance, there is no practical tool to assess the quality of the pass in basketball. The aim of this study is to develop a tool (the quality-pass index or Q-Pass) able to deliver a quantitative, practical measure of passing skills quality based on a combination of accuracy, execution time and pass pattern variability. Temporal, kinematics and performance parameters were analysed in five different types of passes (chest, bounce, crossover, between-the-leg and behind-the-back) using a field-based test, video cameras and body-worn inertial sensors (IMUs). Data from pass accuracy, time and angular velocity were collected and processed in a custom-built excel spreadsheet. The Q-pass index (0–100 score) resulted from the sum of the three factors. Data were collected from 16 young basketball players (age: 16 ± 2 years) with high (experienced) and low (novice) level of expertise. Reliability analyses found the Q-pass index as a reliable tool in both novice (CV from 4.3 to 9.3%) and experienced players (CV from 2.8 to 10.2%). Besides, important differences in the Q-pass index were found between players’ level (p < 0.05), with the experienced showing better scores in all passing situations: behind-the-back (ES = 1.91), bounce (ES = 0.82), between-the-legs (ES = 1.11), crossover (ES = 0.58) and chest (ES = 0.94). According to these findings, the Q-pass index was sensitive enough to identify the differences in passing skills between young players with different levels of expertise, providing a numbering score for each pass executed.

A Wearable System to Assist Walking of Parkinson´s Disease Patients

2010 ◽  
Vol 49 (01) ◽  
pp. 88-95 ◽  
Author(s):  
M. Plotnik ◽  
D. Roggen ◽  
N. Giladi ◽  
J. M. Hausdorff ◽  
G. Tröster ◽  
...  
Keyword(s):  
Real Time ◽  
Detection System ◽  
Freezing Of Gait ◽  
Advanced Parkinson’S Disease ◽  
The Subject ◽  
And Performance ◽  
Pharmacologic Treatments ◽  
Context Aware System ◽  
Post Hoc

Summary Background: About 50% of the patients with advanced Parkinson’s disease (PD) suffer from freezing of gait (FOG), which is a sudden and transient inability to walk. It often causes falls, interferes with daily activities and significantly impairs quality of life. Because gait deficits in PD patients are often resistant to pharmacologic treatment, effective non-pharmacologic treatments are of special interest. Objectives: The goal of our study is to evaluate the concept of a wearable device that can obtain real-time gait data, processes them and provides asistance based on pre-determined specifications. Methods: We developed a real-time wearable FOG detection system that automatically provides a cueing sound when FOG is detected and which stays until the subject resumes walking. We evaluated our wearable assistive technology in a study with 10 PD patients. Over eight hours of data was recorded and a questionnaire was filled out by each patient. Results: Two hundred and thirty-seven FOG events have been identified by professional physiotherapists in a post-hoc video analysis. The device detected the FOG events online with a sensitivity of 73.1% and a specificity of 81.6% on a 0.5 sec frame-based evaluation. Conclusions: With this study we show that online assistive feedback for PD patients is possible. We present and discuss the patients’ and physiotherapists’ perspectives on wear-abilty and performance of the wearable assistant as well as their gait performance when using the assistant and point out the next research steps. Our results demonstrate the benefit of such a context-aware system and motivate further studies.

scholarly journals THE PHYSICAL PHENOMENON OF THE «MÖSSBAUER EFFECT»

2021 ◽  
Vol 73 (1) ◽  
pp. 120-125
Author(s):  
A. K. Shokanov ◽  
◽  
B. E. Evniev ◽  
E. A. Ospanbekov ◽  
◽  
...  
Keyword(s):  
State Physics ◽  
Excited State ◽  
Nuclear Physics ◽  
Mössbauer Effect ◽  
Physical Phenomenon ◽  
Practical Importance ◽  
Practical Significance ◽  
Mossbauer Effect ◽  
Solid State Physics ◽  
History Of

In this article, the relevance is the physical phenomenon of the "Mössbauer effect", its application and practical significance for science. The article deals with resonant absorptions of gamma radiation, the history of the discovery of this effect and the experiments conducted by the scientist. The concepts of the decay of the nucleus, the energy of the excited state, and the measurement of energy using this effect are considered. The Mossbauer Effect is an example of a physical phenomenon that has found application in many fields of science: chemistry, nuclear physics, solid-state physics, etc. This work is intended to explain the essence of the Mössbauer effect and to show that the discovery of this effect was of great fundamental and practical importance for science as a whole.

Design of Automatic Detection Device for Steel Bar Surface Defects

2012 ◽  
Vol 532-533 ◽  
pp. 390-393 ◽  
Author(s):  
Jian Chuan Zhang ◽  
Wu Bin Li ◽  
Chang Hou Lu
Keyword(s):  
Image Processing ◽  
Surface Quality ◽  
Automatic System ◽  
Surface Defects ◽  
Detection System ◽  
High Luminance ◽  
Linear Ccd ◽  
Steel Bar ◽  
And Performance

To inspect the surface quality of steel bar, we designed an automatic system including linear camera and laser. Through the comparison among kinds of cameras, we select linear CCD to our system. The laser is also chosen by us with its high luminance and performance. Through a series of computation, we select the appropriate camera lens to our device. At last, we draw the whole detection system. This device has been used well and provides a good foundation for prospective image processing.

scholarly journals Wireless Loss Detection over Fairly Shared Heterogeneous Long Fat Networks

Electronics ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 987
Author(s):  
Alan Briones ◽  
Adrià Mallorquí ◽  
Agustín Zaballos ◽  
Ramon Martin de Pozuelo
Keyword(s):  
Fair Use ◽  
Transport Protocol ◽  
Network Simulator ◽  
Network Congestion ◽  
Transport Protocols ◽  
Weighted Fairness ◽  
Different Types ◽  
Wireless Transport ◽  
And Performance

The quality of inter-network communication is often detrimentally affected by the large deployment of heterogeneous networks, including Long Fat Networks, as a result of wireless media introduction. Legacy transport protocols assume an independent wired connection to the network. When a loss occurs, the protocol considers it as a congestion loss, decreasing its throughput in order to reduce the network congestion without evaluating a possible channel failure. Distinct wireless transport protocols and their reference metrics are analyzed in order to design a mechanism that improves the Aggressive and Adaptative Transport Protocol (AATP) performance over Heterogeneous Long Fat Networks (HLFNs). In this paper, we present the Enhanced-AATP, which introduces the designed Loss Threshold Decision maker mechanism for the detection of different types of losses in the AATP operation. The degree to which the protocol can maintain throughput levels during channel losses or decrease production while congestion losses occur depends on the evolution of the smooth Jitter Ratio metric value. Moreover, the defined Weighted Fairness index enables the modification of protocol behavior and hence the prioritized fair use of the node’s resources. Different experiments are simulated over a network simulator to demonstrate the operation and performance improvement of the Enhanced-AATP. To conclude, the Enhanced-AATP performance is compared with other modern protocols.

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